a = 10
b = 20

# a = b
# print(a)

# a += b  # 等价于a = a + b
# print(a)
#
# a -= b  # 等价于a = a - b
# print(a)
#
# a *= b # 等价于a = a*b
# print(a)
#
# a /= b
# print(a)
#
# a %= b
# print(a)
#
# a //= b
# print(a)
#
# a **= b
# print(a)